Hidden Letter Found During Museum Renovation Has Biting Message

Museums and galleries display treasures found out in the field, so finding a piece of history in the museum building itself is a rarity, to say the least. But that's exactly what happened during recent renovations at the National Gallery in London. 

According to The Art Newspaper, contractors working at the National Gallery's Sainsbury Wing found quite a time capsule during demolition work last year that has just been unveiled. The letter, dated July 26, 1990, was written by John Sainsbury...